Multi-link piezoelectric structure for vibration energy harvesting

Rameen M. Aryanpur; Robert D. White

doi:10.1117/12.915438

27 March 2012 Multi-link piezoelectric structure for vibration energy harvesting

Rameen M. Aryanpur, Robert D. White

Proceedings Volume 8341, Active and Passive Smart Structures and Integrated Systems 2012; 83411Y (2012) https://doi.org/10.1117/12.915438
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

Abstract

Work in piezoelectric vibration energy harvesting has typically focused on single member cantilevered structures with transverse tip displacement at a known frequency, taking advantage of the optimal coupling characteristics of piezoceramics in the 3-1 bending mode. Multi-member designs could be advantageous in delivering power to a load in environments with random or wide-band vibrations. The design presented in this work consists of two hinged piezoceramic (PZT-5A) beams x-poled for series operation. Each beam measures 31.8mm x 12.7mm x 0.38mm and consists of two layers of nickel-plated piezoceramic adhered to a brass center shim. The hinge device consists of two custom-machined aluminum attachments epoxied to the end of a beam and connected using a 1.59mm diameter alloy steel dowel. A stainless steel torsion spring is placed over the pin and attached to the aluminum body to provide a restoring torque when under rotation. The design is modeled using the piezoelectric constitutive equations to solve for voltage and power for a set of electromechanical boundary conditions. Experimental measurements on the design are achieved by bolting one end of the structure to a vibration shaker and fixing the other to a rigid framework of industrial aluminum framing material. For a given frequency of vibration, power output of the structure can be obtained by measuring voltage drop across a resistive load.

Citation Download Citation

Rameen M. Aryanpur and Robert D. White "Multi-link piezoelectric structure for vibration energy harvesting", Proc. SPIE 8341, Active and Passive Smart Structures and Integrated Systems 2012, 83411Y (27 March 2012); https://doi.org/10.1117/12.915438

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